求证:A=(X-Y-A)^2+2(XY+Y+2)求证:对于任意实数X和Y:A=(X-Y-A)^2+2(XY+Y+2)
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求证:A=(X-Y-A)^2+2(XY+Y+2)求证:对于任意实数X和Y:A=(X-Y-A)^2+2(XY+Y+2)
求证:A=(X-Y-A)^2+2(XY+Y+2)
求证:对于任意实数X和Y:A=(X-Y-A)^2+2(XY+Y+2)
求证:A=(X-Y-A)^2+2(XY+Y+2)求证:对于任意实数X和Y:A=(X-Y-A)^2+2(XY+Y+2)
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